Bathtub



FIG. 1 is a front, top, right side perspective view of a bathtub showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a front, bottom, left side perspective view thereof.

The broken lines in the drawings depict portions of the bathtub that form no part of the claimed design. 

CLAIM We claim the ornamental design for a bathtub, as shown and described. 